Lo-Dash Essentials

Preface

At times, JavaScript can be a frustrating programming language to work with. Just when you think you have it entirely figured out, performance or cross-browser issues reveal themselves in the worst possible way. Lo-Dash is just one of many libraries that aim to help JavaScript programmers write code that's elegant, efficient, and portable. Underscore.js introduced a better way to perform functional programming with JavaScript. Lo-Dash is a continuation of this effort, and throughout this book, we'll see what sets Lo-Dash apart from other libraries out there, including Underscore.

At its heart, JavaScript is a functional language, but not necessarily a pure functional language—you can modify variables and introduce side effects. However, ...